This is the mail archive of the
gcc-help@gcc.gnu.org
mailing list for the GCC project.
Re: 32-bit libraries in 64-bit build.
- From: Bob Plantz <plantz at cds1 dot net>
- To: Ian Lance Taylor <iant at google dot com>
- Cc: Brian McGrew <brian at visionpro dot com>, gcc-help at gcc dot gnu dot org
- Date: Wed, 20 May 2009 09:03:53 -0700
- Subject: Re: 32-bit libraries in 64-bit build.
- References: <C639623F.391C5%brian@visionpro.com> <m3ljor3k74.fsf@google.com>
On Wed, 2009-05-20 at 07:47 -0700, Ian Lance Taylor wrote:
> Brian McGrew <brian@visionpro.com> writes:
>
> > Is there any way of using a 32-bit library in a 64-bit build environment???
> > Our entire software build is 64-bit but I need to use a vendors library that
> > is only 32-bit and never will be 64-bit. Any such way of accomplishing this
> > task?
>
> No. If an x86 processor is running in 64-bit mode, then it can not
> execute code compiled in 32-bit mode. The two modes are not compatible.
>
> The closest you can come is to write a 32-bit wrapper program around the
> library, run it in a separate process, and use some sort of RPC to
> communicate with it.
>
> Ian
Wouldn't this depend on whether it is statically linked or dynamic? I
could certainly use 32-bit mode calling conventions in my 64-bit code
and call a function that uses only 32-bit instructions.
(I'm probably revealing my ignorance of libraries here.)
Bob